THE AXIAL COMPRESSION RATIO OF COLUMNS WITH L, T-SHAPED CROSS-SECTIONS

In this paper, an investigation on axial compression ratio of columns with T, L-shaped cross-sections is carried out by numerical method. The analytical results indicate that the axial compression ratio of columns with L,T-shaped cross-sections is related to section dimensions. In order to raise the axial compression ratio when the web is in compression, the favorable effects of changing the form of reinforcement and considering the confined concrete are discussed. The following results can be drawn through theoretical analysis: the axial compression ratio index reduces with the drop of the ratio of length to thickness of sections; the index will increase when the steels in the end of the web are enhanced; under certain diameter and spacing of stirrups, the axial compression ratio index is raised. At last, the axial compression ratio indexes considering the dimensions of columns with T, L-shaped cross-sections are given.